Guy's cerebrospinal manometer, 1860-1950.

Cerebro-spinal manometer, 1860-1950.

'Guy's Mill, From The Road', c 1880.

Delenil's Reciprocating Vacuum Punch and two manometers, 1876.

Stereoscopic view of Broadway, New York City, United States, c 1860.

Ernest Henry Starling, English physiologist, early 20th century.

Stereoscopic cards for use in a stereoscope, c 1850-1950.

Polack stereoscope on stand, c 1920-1950.

Maddox stereoscope, manufactured by C W Dixey & Son Ltd, 1920-1950.

James Robinson, photographer, c 1860.

The Houses of Parliament, London, c 1945.

Bristol Sycamore helicopter, c 1950s.